Fix toast spam

[brucetony]

When polling the PO, if it down or disconnected then toast messages will spam the user. this should be fixed by either using groups, limiting lifespan of message to 0, a flag, or some combination of the three e.g.

const apiState = ref({
  isDown: false
});

async function someApiCall() {
  try {
    const response = await api.call();
    if (apiState.value.isDown) {
      apiState.value.isDown = false;
      toast.add({
        severity: 'success',
        summary: 'Connected',
        detail: 'Connection restored',
        life: 3000
      });
    }
  } catch (error) {
    if (!apiState.value.isDown) {
      apiState.value.isDown = true;
      toast.add({
        severity: 'error',
        summary: 'Connection Error',
        detail: 'Unable to reach server',
        group: 'api-error',
        life: 0 // Sticky until resolved
      });
    }
  }
}

This will likely need to be implemented in the hubApi fetch plugin